J/AJ/136/1039ivo://CDS.VizieR/J/AJ/136/1039doi:10.26093/cds/vizier.51361039CDSCarrera R.Gallart C.Aparicio A.Costa E.Mendez R.A.Noel N.E.D.2011-06-08T18:01:02Z2011-05-19T08:19:33ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frmagellanic-cloudsgiant-starsinfrared-astronomyspectroscopyradial-velocityinfrared-photometryvisible-astronomyphotometryWe present stellar metallicities derived from Ca II triplet spectroscopy in over 350 red giant branch stars in 13 fields distributed in different positions in the Small Magellanic Cloud, ranging from ~1{deg} to ~4{deg} from its center. In the innermost fields, the average metallicity is [Fe/H]~-1. This value decreases when we move away toward outermost regions. This is the first detection of a spectroscopic metallicity gradient in this galaxy. We show that the metallicity gradient is related to an age gradient, in the sense that more metal-rich stars, which are also younger, are concentrated in the central regions of the galaxy.2008AJ....136.1039Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/136/1039CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/131/2514 : Radial velocities of red giants in the SMC (Harris+, 2006)J/AJ/135/836 : Calcium triplet index in LMC stars (Carrera+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/136/1039https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/136/1039http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/136/1039https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/136/1039https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/136/1039http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/136/1039GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/136/1039/table2 (Red giants stars observed)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/136/1039/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/136/1039/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/136/1039/table2?GETtext/xml+votable180.050000true8.474167-70.4086940.0055555555555555565/8321 6/32942 32943 33293 33304 33318 33324 33326 334122.367228618189496e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/136/1039?format=asciiOpticalInfrareddefaultJ/AJ/136/1039/table2Red giants stars observedImag? The I band magnitudemagphot.mag;em.opt.IfloatnullableRVRadial velocitykm/sphys.veloc;pos.heliocentricfloate_RVThe 1{sigma} uncertainty in RVkm/sstat.errorfloatCommAdditional comment ("AGB", "AGB?" or "No member")meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainW.CaTThe CaT index (1)0.1nmspect.line.eqWidthfloate_W.CaTThe 1{sigma} uncertainty in W.CaT0.1nmstat.errorfloatVmag? The V band magnitudemagphot.mag;em.opt.Vfloatnullable